title: Fabrication of two kinds of eight-fold photonic quasi-crystals assisted by a specially designed prism.
abstract: We demonstrate that two kinds of 2D eight-fold photonic quasi-crystals (PQCs) can be fabricated by a specially designed prism via single-exposure holographic lithography. The prism with five continuous side surfaces out of common eight symmetrical side surfaces, plus a top surface, is well designed for PQC fabrication. Compared with the traditional method of setting up eight free-space beams in the half-space for an eight-fold PQC fabrication, our specially designed prism reduces the number of beams, avoids the differences of beam-to-beam phases, and simplifies the fabrication process. The theory and computer simulation confirm the patterns of two kinds of PQCs by a single prism illumination recording. Further, these quasi-crystal patterns are successfully verified by experimental results under a scanning electron microscope. In addition, these samples show some good properties, such as uniformity over large area, the implementation of a single defect by underexposure, and symmetry break of the eight dots. Our special prism-assisted holographic lithography technique provides a base for further investigating the optical properties of these novel structures.
authors.forename: Kai
authors.initials: K
authors.lastname: Shen
authors.forename: Guomin
authors.initials: G
authors.lastname: Jiang
authors.forename: Weidong
authors.initials: W
authors.lastname: Mao
authors.forename: Sarfaraz
authors.initials: S
authors.lastname: Baig
authors.forename: Michael R
authors.initials: MR
authors.lastname: Wang